currier



-J J. CURRIER.

' Chimney Cow 'No. 82,497. I Patented Sept. 29, 1868..

N. PETERS, FHOTO-LITHOGRAPHER, WASHINGTON, D C.

JOHN J. GUERIER, 0 F GLOUCESTER, MASSACHUSETTS.

Letters Patent No. 82,497, dated September 29, 1868.

IMPROVEMENT IN CHIMNEY-BOWLS.

filly: Stlgshnle rtfrmh in it time Esters 33mm in making part at the2mm.

TO ALL PERSONS TO WHOM THESE PRESENTS MAY'COME:

Be it known that I, JoI IN J. OURRIER, of Gloucester,in the county ofEssex, and State of Massachusetts, have :nvent'ed a new and usefulVentilator or Chimney-Cap; and I do hereby declare the same to be fullydescribed in the following specification, and represented intheaecompanying drawings, of which- Figure-1 is a side elevz tion, and

Figure 2 a vertical section of it.

In such drawings, A denotes a conduit or tube, open at each end, andhaving a hollow conical frustum, B,

extended downward from its upper end, and arranged concentrically withrespect to the said tube, the said frustutn, at its smaller base, beingfastened to the tube A, and corresponding in diamcter with the top ofthe said tube, -Abovc, and concentric with the said frustum B, isanother hollow conic frustum,'C,there being'a space, 0, between thc two,entirely around the frustum B. The said frusturn C is open at its upperend, as shown at a, and above the said opening a horizontal disk orcover, E, is arranged, it being supported by a series of posts or rods,11, extending up from the frustuin O. Y

At its larger base or lower edge the frustum G is united to the largerbase of another such frustum, D, which is inverted, extends below thefrustum G, and encompasses the tube A, and at its lower end has adiameter larger than that of the tuhe'A, in order that there may be anannular opening or passage, 0, between the lower edge of the fr'ustum Dand the outer surface of the tube. V g I The slope of the side of eachfrustum I generally arrange at an angleof forty-five degrees with: theaxis of the tube. I

Without the frustum or guard 13, arranged with respect to thetube A, thefrusta G D, and the cover-plate E, arrangcd together asdcscribed, itfrequently happens that a current oi wind, while passing across orthrough theflventilator, will beso met by a counter-current, inducedthrough the opening 0, as to arrest the upwardcurrent through the tube,and frequently directit downward, so as to cause the chimney'on whichthe, cap or ventilator may be placed, to discharge smoke into the roomfrom which its flue may proceed. Thc whole combination and arrangementof frusta with the tube and the cover E are found to operate perfectly,and whatever mafbe the direction of the wind upon 'the ventilator, noreversal of the upward currenbof smoke or air, that may be passing upthe tube, can or will take place. i

After passing lip through the pipe A, the smoke will next rush throughthe openi-ng'a, and be discharged against the plate E, which willdeflect it laterally into the atmosphere, and any current of wind whichmay strike the ventilator fromany direction, will tend to promote orincrease the upward fiowage of the smoke in the tube, or itsdischarge"therefrom, as experiment will thoroughly demonstrate.

I make no claim to the arrangement of the cover E, and either or both ofthe frusta D, with the tube A, but

What I do claim as my invention, is I The combination, as well as thearrangement, of the three frusta B C 'D, the cover E, and the tube A,the

whole being connected so as 'tooperate substantially as described.

JOHN J. OURRIER.

Witnesses:

R. 11. Ever, F. P. HALE, Jr.

